To calculate the excess earnings for Sharon, we need to find the difference between her earnings and the maximum assessable earnings in Prince Edward Island.
Excess earnings = Sharon's earnings - Maximum assessable earnings
Excess earnings = $55,300 - $52,100
Excess earnings = $3,200
Therefore, Sharon's excess earnings are $3,200. This means that $3,200 of her earnings are not subject to certain payroll taxes or deductions based on the maximum assessable earnings in Prince Edward Island.